Spacing-table machine.



G. P. THOMAS.

SPACING TABLE MACHINE.

Patented Nov. 6, 1917.

3 SHEETS-SHEET I Mom m m i m V THE m 6 a E Q 2 Q a O, m u. I- a S 5, W MY W .L HUE G P. THOMAS.

SPACING TABLE MACHINE. APPLICATION FILED DEC.30|1916.

1 2%,530. Patented Nov. 6, 1917.

3 SHEETS-SHEET 2.

G. P. THOMAS.

SFACING TABLE MACHINE.

APPLICATION HLED DECK-30. 191s.

Patented Nov. 6,1917".

3 SHEETS$HEET 3.

INVENTOR Gnome 31m:'THQMAS QF GLENSHA ;@zanlmsYnvAmez "3 Q s ny" Lalfite 'e rqPennsy Ya i'e bi of the a United States, have invented :or idered vs ai l ew an sefuli ,l hro e-i s; i pi iilg f b eMaqhi esy'iii himprovements the following f'is {a specification"; 1

nimyus:,Leeers' raenwe15 795 5 re is sh a d des r bedi sp cin m1; .1chinewhei einth cariiagefitself is providedjif witht o sets ojfgcoiidinated; locks, onef pp g e adie and. the bh t e bound nioven ient' ofvthe 'car 'ia ge. Thelma chine also conte nplates, first,fan ja d vanceofi the carriage a 1 short uismne 'aft'e the stop ping parts havebeenfbfought-into engagementfiitli each other, and seeo ndly,' a subse-f I q en b ckw movemii ,c ti -sequ n d; stOPPi P int-t .c I .5 iii The0b"ect of 'inyflpresjent invention is to? provide a spacing machine ofthe same geneml cter'a dio he e eral spur-J pose as that of theabovenamed patent, but l wherein the table is pijouided 1v ,fsto'ps 1 ratherthan havinglalljjtlie stopp ng' partsj '1 bor'ne' by the carriage A 'fuitheiiobjectof my invention is; by inip ovingthe 'details' of j 1construction of such machine, to i'nci easethe eiiicieney thereof. Inthei accon panyingf sheets 0 drawingsf'j forming part1 fo'f' myspecification I ghai ef" illustrated the preferred-embodiment of my jjinvention. Figurel isfa top pla'n' Yiew themaehin'e; Fig. 2 asideeleuation there of Fig. 3 a vertical sectional ,view'taken on I, theline II IIII ',QFig. 1 ;,Fig. 14:";1 sectional] View taken on th'edine3; 5 a detail of construction ex lained: herein 1 after. Fig; 6 1 across-sectional f viewiof, a 1 modified foi'iii' of S aci g table; andT: a sectional View taken onthe' line VII-4W1,

the illustrativeembodimentfofi my invention, referring firstQto'Fi'gs.land '5,' in"" elusive, there {is shdjylifhut a' 'poztion of 'a p i' g ibl i ich m y, di dfm constructed of a horiiontalTc hannel l andjfsidechannels.2IfTQWhile' th afiiagemaybe' o tm fi di thefl?J r i pt rmaterial to; 1 ffiieljited i 113 th'e foffil'er ari-angeiiient isillustratediheiieim' the "car i es ,cgn iv in ae a names; t j fi nd? a5; amp *5 for enga ing' the mateiia1;' For "*movingfth'e earriage it'isprovided fwith'ka w I p r I V y k w rot'atabl'y mounted sliaft 6 haviiiga pi-n-ion residing at Glenshawyiuth e county bi Allei 7 'secu'red'to'it and which engages a rack 8 attached to the tjop' ,1 of the table.This? 'shaftniay beturnedhy a hand Wheel 93 01 -other'wise, as'd'esifed.

I f'th p'i'acti'ce df my iniiention the table has; seciiieditd itpluialityof stop ing ele' 'f' ments having oppositely dispesed stoppingfaces, and the carriage-is provided iivith' mova le 'engagers adapted toengage such oppositely disposed faee's *ofi'ithe' stop-' ing elements; 4and thereby arrest -th'eiad-- "Vance mo-Yement of the earn-age as 1wel'l a's -1ts-subsequentrebound moveinentl-- While various for'insofstopping elements v may: be used plf'efelj ably provide a detenfibaIFlQ having, on-its uppen'face, teethWitl-i' 1 oppd sitely f'clisposed stopping fa'ces 11 a'ndi 1i 11"; seenparticulailji in' Fig;5. The teeth -7 5 are prefei-ably sjniineti ical'so that-in case M thyiseedme uneveely' worn' the b r nmy be turnedend-foi'end.. The stopengager'sEalie preferably pivotally mounted, pawls 12 and 13{ piovi'ded'at their free ends with teeth Whichimay-bea pair elf-bars l4, and whichis mounted forf'ecip'rocatory moyeinent in a direction substantiallyparallel to the line of. Q

advanceiof the carriage, As's'een in-Fig. '3;

the ipawlsi 13 the rebound stop engagers," are-pro vided'at their upperends With round holes'thi'oughwhich there extends a pin 15 f secured tothe. bars 14; These bars at their ends nearest the pin 15- are-slidalolymounted in a'.housingf1'6'. On; the other-hand, the pawls"12-, the stop 'engagers forresisting the advanc'efinovement o'f'thecarriage; are pro- 1 vided With"longitu'dinally disposed slots 17,

thifoughlwhich'thei'efeXtendsa pin 18 This pin in"turn pa sses throughround holes in the 'ba rs 14; and? is attached to vertically disposed'ai'mpf' a bell-crank lever 19,- thef horizontal "aim thereofbeingpivotally connectedfwa rod 20 extending through a top"" plate 21"of'thecarriageiand engaging the. upper end of a buffer spring 22;initial i; tension is placed on the spring-"22,- and the red; 2Q isprovided With shoulders adapted 3 0 engagethe' platefll fol-limitingthQllP- ward movement of the rod in response to the action of thespring.

Means are provided for holding thepawls out of engagement with thestops, for releasing such holding means at the desired time to effect astopping of the carriage, and" for again bringing the pawls into engagement with the holding means; In the illustrative embodiment of myinvention in its preferred form, the sets of pawls 12 and 13 are held inraised position by latches 23' and as by means of pins 31, which may bedriven into a strip of wood 32. The finger being thus swung backwardly,the latch 23 is, through link 28, arm 27 and shaft 25, moved 7 in thesame direction to release the pawls 12, which then drop upon the detentbar 10. The pawls 13 are preferably released subsequently to the releaseof the. pawls 12 and substantially coincident with the engagement of thepin 18 by the lower'end of the pawl slot 17. For this purpose thelatches 23 and 24: are provided with fingers 33 and 34, respectively,the former being adapted to engage, the latter to trip the latch 24L.These fingers are, as indicated, so disposed one above the other as toaccomplish the above stated successive releaslng of the latches 23 and24. To raise the sets of means of suitably slotted links ,35 and 36,connected to the rod 30, which in turn is supported by lever arms 37secured to a rotatable shaft 38. A suitable conterweighted arm 39 may beused to rotate the shaft 38. It will be observed that, in raising oftherod 30 to liftthe pawls, the finger 29 is likewise raised so that itmay swing beyond the engaged pin 31 to .a position to be engaged by thenext successive pin. 7 V

In the operation of this embodiment of my invention, the carriage ismoved along the table by the rotation of the driving shaft 6. When thefinger 29 strikes a pin 30 the finger is swung backwardly to turn thelatch 23 to release the pawls 12 and permit them to drop into engagement,with the detent bar 10. The further swinging of the finger 29 causes afurther turning of the latch 23 to cause 3 its finger 33 to engage thefinger. 34 of the latch 24, which latch comes to pawl-releasing positionat substantially the same time the lower end of a slot 17 of the pawl 12strikes the pin 18. The momentum of the carriage and its engaged load isthen resisted and ,ab

; sorbed by the spring 22, the connections for this purpose between Suchspring and the carriage frame including 'pawls 12, bellcrank lever 19and rod 20. It is of importance to observe that, during themomentum-absorbing period of the movement of the carriage, the pawls 12and 13 engaging the detent bar or stops are, by means of the beingwedged against the teeth and hence bebars 14, held against movement withrela- '1 come difficult torelease from engagement with them: lVhen themomentum of the cari riage has become absorbed by the spring 22, suchsprlng reacts to br ng the carriage-back to the'po'sit-ionit occupiedimmediately preceding the downward movement of the spring-compressingrod 20. Any further backward movement of the carriage 1s then resistedby the rebound pawls 13. T 0 release;

the pawls and set the machine for the next movement of the carriage itis only necessary to press downwardly the arm 39.

In the modification of my inventionillustrated in Fi s. 6 and 7 the rackor detent bar 10 of themachine just described is replaced with aplurality of separately adjustable stopping elements eO,provided withoppo' sitely disposed stopping faces. Fig. 6 shows the horizontal table41 as being provided with slots42 to receive the heads of bolts 43 tohold the stops in their adjusted positions. 1

maybe used for. fastening these stops} In pawl 12 is preferably providedwith a round hole for engaging the pin 18. The pawls may be lifted fromstop engaging positions Any other well known or suitable means 3 I I ,7this modification of construction there may R pawls 12 and l3from Iengagement with the detent bar, they are, by

and subsequently released by mechanism the same asthat shown in, anddescribed with referenceto, Figs. 1 and 4, inclusive. On the other hand,the pawls may, if desired, slide upon the top of the table 41between thestops 40,-the pawl 13 being beveled as at 44 to cause it to ride overthe stops as the carriage is advanced. For raisingthe pawl 12 to pass astop, the arm 39, shaft 38, lever arm 37, and link 35 may be used;

It will be understood of this modification that the parts not shown andspecifically described may be the same as shown'in Figs. 1 to 1,inclusive, and already described.

According to the provisions of the patent statutes I have described theprinciple and. operation of my invention together with the machine'andits modifications which I now consider to represent the best embodimentthereof. However, it will be understood that my invention may bepractised by other forms of machine than that particularly shown anddescribed.

I claim as my invention:

1. In a spacing machine, the combination of a spacing table, a pluralityof stopping elements secured at longitudinal intervals thereto andprovided with oppositely disposed stopping faces, a carriage movableupon said table, two oppositely acting stopengagers movably secured tosaid carriage and adapted to engage said oppositely disposed faces ofsaid stopping elements, one of said engagers resisting the advance andthe other the rebound movement of the carriage, and means for releasingthe advance resisting stopengager from a stop.

2. In a spacing machine, the combination of a spacing table, a pluralityof stopping elements secured at longitudinal intervals thereto andprovided with oppositely disposed stopping faces, a work carriagemovable upon said table, two oppositely disposed pawls pivotallyconnected to said carriage and adapted to engage said oppositelydisposed faces of said stopping elements, one of said pawls resistingthe advance and the other the rebound movement of the carriage, andmeans to release said pawls from the stopping elements.

3. In a spacing machine, the combination of a spacing table, a pluralityof stopping elements secured at longitudinal intervals thereto andprovided with oppositely disposed stopping faces, a work carriagemovable upon sa1d table, two oppositely disposed pawls pivotallyconnected to said carriage and adapted to engage said oppositelydisposed faces of said stopping elements, one of said pawls resistingthe advance and the other the rebound movement of the carriage, holdingmembers for keeping said pawls out of engagement with said stoppingelements, and means effective upon the advance of the carriage forreleasing said holding means.

4. In a spacing machine, the combination of a spacing table, a pluralityof stopping elements secured at longitudinal intervals thereto andprovided with oppositely disposed stopping faces, a work carriagemovable upon the table, a rigid member mounted upon said carriage forreciprocatory movement substantially parallel with the line of advancethereof, a momentum absorbing buffer resisting the movement of saidmember in one direct-ion, two oppositely disposed pawls pivotallyconnected to said member and adapted to engage said oppositely disposedfaces of said stopping elements, one of said pawls resisting the advanceand the other the rebound movement of the carriage, and means forreleasing the advance-resisting pawl from a stop.

5. In a spacing machine, the combination of a spacing table, a pluralityof stopping elements secured at longitudinal intervals thereto andprovided with oppositely disposed stopping faces, a work carriagemovable upon said table, a rigid member mounted upon said carriage forreciprocating movement substantially parallel with the line of advancethereof, a momentum-absorbing buffer resisting the movement of saidmember in one direction, two oppositely disposed pawls pivotallyconnected to said member and adapted to engage said oppositely disposedfaces of said stopping elements, one of said pawls resisting the advanceand the other the rebound movement of the carriage, holding means forkeeping said pawls out of engagement with said stopping elements, andmeans effective upon the advance of the carriage for releasing saidholding means.

6. In a spacing machine, the combination of a spacing table, a detentbar secured thereto and provided with symmetrical teeth spaced at shortequal longitudinal intervals and having oppositely disposed stoppingfaces, a work carriage movable upon said table, two oppositely disposedpawls pivotally connected to said carriage and adapted to engage saidoppositely disposed faces of said teeth, and means for releasing saidpawls from said teeth.

7. In a spacing machine, the combination of a spacing table, a detentbar secured thereto and provided with symmetrical teeth spaced at shortequal longitudinal intervals and having oppositely disposed stoppingfaces, a work carriage movable upon said table, a rigid member mountedupon said carriage and for reciprocatory movement substantially parallelwith the line of advance thereof, a momentum-absorbing buffer resistingthe movement of said member in one direction, two oppositely disposedpawls pivotally connected to said carriage and adapted to engage saidoppositely disposed faces of said teeth, holding means for keeping saidpawls out of engagement with said teeth, and means effective upon theadvance of the carriage for releasing said holding means.

In testimony whereof I have hereunto set my hand.

GEORGE PAUL THOMAS. Witnesses:

PAUL N. ORITCHLOW, FRANCIS J. TOMASSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner 0! Patents, Washington, D. G.

